Fluid flow control device
OwnerJames S. Jonesinventor
Life of this patent
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Abstract
A device for controlling flow of a pressurized fluid including conduit means for conveying the fluid without substantial directional deviation in the direction of flow. Metering means is disposed in said conduit means for control of the flow of said fluid. A throttle piston is movable into and out of the conduit means and is responsive to the flow of the fluid for maintaining a constant pressure drop across the metering means for any given setting of the metering means. The metering means includes a pierced cylindrical valve body rotatable on an axis transverse to the axis of the conduit means with two scale index structures attached thereto for indicating adjustment of flow rates appropriate to either of two source pressures.
Claims9
A device for controlling the flow of a fluid delivered from a pressurized source comprising:
- a housing having a straight bore extending therethrough;
- a manually settable metering valve disposed in said bore, to select a flow rate;
- a piston movable into and out of said bore downstream of said metering valve;
- and
- first control means disposed in said housing in fluid communication with said bore upstream and downstream of said metering valve and second control means disposed in said housing in fluid communication with said bore upstream of said metering valve by way of said first control means and in direct communication with said bore downstream of said metering valve for driving said piston to maintain the pressure drop across said metering valve at a predetermined value.
A device for controlling the flow of ammonia from either of two pressurized sources comprising:
- a housing having a straight bore extending therethrough;
- a manually settable metering valve disposed in said bore, to select a flow rate;
- a piston movable into and out of said bore downstream of said metering valve;
- and
- control means in fluid communication with said bore upstream and downstream of said metering valve for driving said piston to maintain the pressure drop across said metering valve at a predetermined value wherein said control means comprises:
- a first channel in said housing extending from said bore upstream of said metering valve;
- a controlled valve in said channel, structure forming a first chamber in fluid communication with said channel divided by a diaphragm and responsive to pressures in said chamber to open said controlled valve,
- a second channel extending from said bore downstream of said metering valve and upstream of said piston and leading to said first chamber to close said controlled valve;
- and
- structure forming a second chamber in fluid communication with said first channel and with said second channel and containing a diaphragm for driving said piston in response to the pressure drop across said metering valve.
A device for controlling the flow of pressurized ammonia from either of two pressurized sources comprising:
- an elongated housing;
- a bore extending through said housing for flow of the ammonia without substantial deviation from a straight line path;
- a manually adjustable metering valve for producing a drop in the pressure of the ammonia and positioned in said bore;
- a spring biased piston movable into and out of said bore downstream of said metering valve;
- a diaphragm valve means disposed in said housing in fluid communication with said bore upstream and downstream of said metering valve;
- and
- piston actuating diaphragm means disposed in said housing in fluid communication with said bore upstream of said metering valve by way of said diaphragm valve means and in direct communication with said bore downstream of said metering valve for actuating said piston to maintain said pressure drop across said metering valve at said predetermined value.
Dependencies are inferred from the claim text.